The problem is you completely wrong, GTX680 and GTX780/Ti didnt use the same chip.
HD7970 = Tahiti - released Jan 2012
GTX680 = GK104 - released March 2012
GTX780 = GK110 - released May 2013
R9 290X = Hawaii - released Oct 2013
GTX780 Ti = GK110B -released Nov 2013
Both AMD and NVIDIA released two Chips and made 4 products, 2 from each chip.
GK110 was way larger and more expensive than Hawaii and it was definitely not meant to compete against Tahiti (HD7970).
Tahiti = 352mm2
GK104 = 294mm2
Hawaii = 438mm2
GK110 = 561mm2
Just like the HD 5870 (334 mm2) wasn't suppose to compete with the GTX 480 (529 mm2)?
You're going to tell me AMD's goal was to compete with GK104? Or they they were blind sided by GK104's performance? This is like Glo. trying to spin AMD originally meant to charge more only to reduce price days before release as a "gotcha!" move and not a "oh shoot!"
When I said "one chip" you know I meant one family. NV didn't have to do design a new chip to compete, they had the GK100 -> GK110 ready to respond to whatever AMD brought out to compete.
You're right, GK110 wasn't suppose to compete with HD 7970, they didn't need to. Their half chip did it for them allowing NV to cash cow GK100/110. This is not a win for anyone but Nvidia.
This is wrong. The GK110 wasn't even announced until November 12, 2012. And then, this was only for things like the Tesla, NO consumer cards. It was NEVER going to be released along with the GTX 680. The 780 coming in 6 months after the Tesla is about when nVidia typically puts out a "consumer" version of the big chip GPU.
There was no "need" for a consumer version. Oddly when there was guess who got trotted out. It's as if no one remembers HD 5K vs GTX 400. NV released a clearly unready GF100 to compete with a healthy AMD and Cypress. This is an example of AMD forcing NV to respond. Not this nonsense of AMD constantly playing catch up since the HD 5K.
Again, we enthusiast knew GK100/Gk110 was waiting, it was just a matter of when.
The whole idea of the GK-104 being a "mid range chip" stemmed from it having all of its compute ripped out of it and thereby making it a smaller chip. But this didn't make it lower end, this was part of nVidia changing how it was building its gaming GPU's. The 480 and 580 were both monster chips that sucked power and had lots of compute. For AMD, the 5xxx/6xxx series was more a slim, gaming GPU.
But then AMD went "we need to compete with the 580" so Tahiti had a bunch of compute. Which turned out to be great long term, but really hurt it early on as nVidia then released a slim GK-104 that games just as fast, but at much lower power because it lacked all that extra compute. So both makers countered the others previous generation.
We are now back into both makers doing things kind of the same way. Only AMD currently lacks a big chip design. We will have to see what this year brings.
Exactly! NV segmented their product line and it caught AMD off guard. You can form your own opinions, but I believe that's why AMD upped the HD 7970 to $550 from the HD 6970's $380 launch prices. They were probably not expecting NV's gains. And with Navi we see AMD doing what NV did with Kepler - driving a wider wedge between their compute cards and "sleek" gamer cards while simultaneously raising prices.
The only thing I disagree with is it was a long term gain for AMD. The HD 7970 is where you can trace a lot of bad luck for AMD. This card, while an amazing product, was a sore eye to AMD for years starting such bogus memes as FineWine, further reducing AMD's brand value with 3+ game bundles on top of price cuts. Just look at the vicious reception to AMD raising prices.